Title :
Analysis Influence of NFD Filter in FSK Modulation for Reduction ISI
Author :
Taheri, Asghar ; Tarihi, M.R. ; Mohamed-pour, Kamal
Author_Institution :
Dept. of Electr. Eng., Malek Ashtar Univ. of Technol., Tehran
Abstract :
We analyze the error floor of binary FSK due to inter symbol interference in time-dispersive mobile radio channels, with a limiter-discriminator-integrator detector. The errors are caused by bursts in the instantaneous frequency. We propose and verify that a nonlinear frequency discriminator can achieve zero error floor for pure FSK by clipping off these bursts. For filtered FSK, the error floor is not completely removed, but strongly reduced - typically by one or two orders of magnitude. The NFD can be also used in conjunction with adaptive sampling
Keywords :
filtering theory; frequency shift keying; intersymbol interference; mobile radio; wireless channels; adaptive sampling; binary FSK modulation; intersymbol interference; limiter-discriminator-integrator detector; nonlinear frequency discriminator filter; time-dispersive mobile radio channel; Delay; Error analysis; Frequency shift keying; GSM; Interchannel interference; Intersymbol interference; Land mobile radio; Low pass filters; Mathematical model; Modulation;
Conference_Titel :
9th International Multitopic Conference, IEEE INMIC 2005
Conference_Location :
Karachi
Print_ISBN :
0-7803-9429-1
Electronic_ISBN :
0-7803-9430-5
DOI :
10.1109/INMIC.2005.334458
